[support] Insert into custom content type module

Hi, I have created a custom content type module called tpr_article. I also have a script that pulls articles from a legacy database and is supposed add the legacy articles into the tpr_article content type. I have set $node->type='tpr_article' and tried to save the node using node_save() in order to save the $node in the right place. The content ends up in the node tables instead of my new tpr_article content type table. How do I, in code, insert the legacy articles using my new content type module tpr_article? If you need any more info please let me know. Thanks, Matt